National Science Olympiad Forum By SOF Olympiad Trainer - Page 286

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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 8

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Subject :NSO    Class : Class 7

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 9
why not b??

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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 8

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 2
option a speed post

Ans 2:

Class : Class 3
all of these

Ans 3:

Class : Class 6
is all of these.

Ans 4:

Class : Class 4
speed post

Ans 5:

Class : Class 4

Ans 6:

Class : Class 4
the question framed incorrectly. It should have been sending wedding card at the earliest

Ans 7:

Class : Class 7

Ans 8:

Class : Class 3
Speed post

Ans 9:

Class : Class 3

Ans 10:

Class : Class 3

Ans 11:

Class : Class 3

Ans 12:

Class : Class 3
the answer seems incorrect. One can send an invitation through all of the available resources. However, if one wants to send invitation speedily, then the option of Speed Post would be more correct.

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Subject :NSO    Class : Class 7

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Subject :NSO    Class : Class 6

Subhi, a class 6 student grouped together a few changes occurring around us as:
Group 1 : Blooming of flowers, breaking of glass, vaporisation of water, sawing of wood
Group 2 : Tides in the ocean, motion of a swing, landslides, occurrence of day and night
Group 3 : Rusting, germination of seeds, burning of fire crackers, growth of a child
Group 4 : Making a paper boat, blowing air into balloon, baking a roti, heating an iron rod
Select the odd one in each group and mention the property which makes it odd.

  Group 1 Group 2 Group 3 Group 4
A Blooming
of flowers
(Physical
change)
Tides in
the ocean
(Periodic
change)
Rusting
(Chemical
change)
Making a
paper boat
(Physical
change)
B Breaking
of glass
(Irreversible
change)
Occurrence
of day
and night
(Natural
change)
Germination
of seeds
(Irreversible
change)
Blowing
air into
balloon
(Reversible
change)
C Sawing
of wood
(Physical
change)
Motion of
a swing
(Periodic
change)
Growth
of a child
(Irreversible
change)
Heating an
iron rod
(Chemical
change)
D Vaporisation
of water
(Reversible
change)
Landslides
(Nonperiodic
change)
Burning of
fire crackers
(Fast
change)
Baking
a roti
(Chemical
change)


Ans 1:

Class : Class 6
answer should be C

Ans 2:

Class : Class 6
Question is not properly framed

Ans 3:

Class : Class 6

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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
None of these

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